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A kind of ester group, cyano co-modified SBS thermoplastic dielectric elastomer material and preparation method thereof

A dielectric elastomer, co-modification technology, applied in the field of new SBS-based thermoplastic dielectric elastomer materials and its preparation, can solve the problems affecting the development of dielectric elastomer drivers, increased dielectric loss, and many defects in composite materials , to achieve the effect of improving the electric drive performance and increasing the dielectric constant

Active Publication Date: 2022-06-10
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the addition of ceramic fillers can significantly increase the dielectric constant of the material, it usually has a higher modulus after being added to the composite material, and there will be more defects inside the composite material, resulting in a decrease in the breakdown voltage of the composite material and a decrease in the dielectric loss. Increase
For conductive fillers, due to the poor interaction between the filler and the matrix, there are more defects in the composite material. Usually, the dielectric loss of the composite material is relatively high, and the modulus generally increases, which affects its performance as a dielectric material. Development of Electroelastomer Actuators

Method used

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  • A kind of ester group, cyano co-modified SBS thermoplastic dielectric elastomer material and preparation method thereof
  • A kind of ester group, cyano co-modified SBS thermoplastic dielectric elastomer material and preparation method thereof
  • A kind of ester group, cyano co-modified SBS thermoplastic dielectric elastomer material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] (1) The specific preparation steps are as follows: 10.6g of mercaptopropionic acid and 15g of cyanoethanol are added to the three-necked beaker, and 100mL of water agent toluene and 0.1 to 0.5g of catalyst p-toluenesulfonic acid are added to the bottle, Under the protection of argon, heating and refluxing at 100 °C for 12 h to separate water and purify to obtain ethyl mercaptopropionate;

[0020] (2) Dissolve 1 g of SBS in 50 mL of tetrahydrofuran, add 11 g of ethyl mercaptopropionate prepared in step (1) and 0.16 g of DMPA, and react under ultraviolet light for 30 min. After the reaction, the obtained solution was evaporated at 40°C using a vacuum rotary evaporator to remove part of the solvent and then precipitated in ethanol. After filtration, the precipitate was dissolved in tetrahydrofuran and then purified by ethanol precipitation. After repeating three times, the new SBS base was obtained by vacuum drying. Thermoplastic Dielectric Elastomer material. The results...

Embodiment 2

[0022] (1) Add 10.6 g of mercaptopropionic acid and 15 g of cyanoethanol into a three-necked beaker, and add 100 mL of toluene with water agent and 0.1 to 0.5 g of catalyst p-toluenesulfonic acid to the bottle, under argon protection Heating and refluxing at 100℃ for 12h and then purifying to obtain ethyl mercaptopropionate nitrile ethyl ester;

[0023] (2) Dissolve 1 g of SBS in 50 mL of tetrahydrofuran, add 11 g of ethyl mercaptopropionate prepared in step (1) and 0.25 g of DMPA, and react under ultraviolet light for 40 min. After the reaction, the obtained solution was evaporated at 40°C using a vacuum rotary evaporator to remove part of the solvent and then precipitated in ethanol. After filtration, the precipitate was dissolved in tetrahydrofuran and then purified by ethanol precipitation. After repeating three times, the new SBS base was obtained by vacuum drying. Thermoplastic Dielectric Elastomer material. The results show that the dielectric constant can reach 15 at ...

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Abstract

The invention discloses a SBS-based thermoplastic dielectric elastomer material and a preparation method thereof, comprising the following steps: firstly preparing cyanoethyl mercaptopropionate (HSCH) through the esterification reaction of cyanoethanol and mercaptopropionic acid 2 CH 2 COOCH 2 CH 2 CN), and then modified SBS by click reaction, and grafted ester group and cyano group with large polarizability on the side chain of SBS at the same time, and prepared branched functionalized SBS thermoplastic dielectric elastomer material. The technical route of the invention is simple, and the grafting rate can be controlled by adjusting the reaction time, thereby adjusting the dielectric constant and the electric-driven strain, and can promote the practical application of the intrinsic thermoplastic dielectric elastomer.

Description

technical field [0001] The invention belongs to the technical field of dielectric elastomer preparation, in particular to a novel SBS-based thermoplastic dielectric elastomer material and a preparation method thereof. Background technique [0002] With the rapid progress of science and technology and the rapid development of intelligence, artificial intelligence equipment has begun to develop in the direction of miniaturization and light weight. Dielectric elastomer, as a new type of electroactive polymer, can be coated with electrodes on both sides to form a dielectric elastomer actuator, which is widely used in small micro robots, micro valves, micro air vehicles and other fields. The development and application of actuators for dielectric elastomers is limited by the need for high driving voltages, especially in the biomedical field, where high driving voltages are dangerous factors for both organisms and devices. [0003] Reducing the driving voltage of dielectric elast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/34C08F297/04
CPCC08F8/34C08F297/04
Inventor 刘雷鹏谢蕊颖张康宁吕生华刘锦茹杨俊杰
Owner SHAANXI UNIV OF SCI & TECH
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